# exponent problem

• September 6th 2007, 07:05 PM
Revelsyn
exponent problem
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• September 6th 2007, 07:06 PM
Jhevon
Quote:

Originally Posted by Revelsyn
I'm having some trouble with this one; I'm not sure how to multiply the neg n by the exponent "1 + n"

"evaluate."

2-n(2n - 21+n)

~everything in red is an exponent/the answer is suposed to be -1..

when multiplying numbers of the same base, we add the powers. that is,

$\displaystyle x^a \times x^b = x^{a + b}$

Note, $2^{-n} \left( 2^n - 2^{1 + n} \right) = 2^{-n} \cdot 2^n - 2^{-n} \cdot 2^{1 + n}$

Now continue using the rule above
• September 6th 2007, 07:19 PM
Revelsyn
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• September 7th 2007, 05:38 AM
Krizalid
Didn't we see this before?
• September 7th 2007, 09:44 AM
topsquark
Quote:

Originally Posted by Krizalid
Didn't we see this before?

It does look remarkably familiar doesn't it?